Piston water-meter



UNITED STATES "PATENT- OFFICE.

FREDERICK 'GUTZKOV OF- SAN FRANCISCO, CALIFORNIA.

PISTON WATER-METER.

SPECIFICATION forming part of Letters Patent No. 400,401, dated March26, 1889.

" v Application tiled November 10,1888. Serial No. 290,484. (No model.)

To @ZZ whom it may concern:

Be it known that I, FREDERICK GU'rzKow, of the cityy and county of SanFrancisco, State of California, have invented an Improvement inWater-Meters; and I hereby declare the following to be a full, clear,and exact description of the sanne.v

My invention relates to water-meters of that class known as,piston-metersg and my object is to construct acheap and accurate meter,the employment of hydraulic pressure exclusively for the actuation ofthe parts, and reversing the stroke by means of a Inechanism which willbe hereinafter more fully explained.

Referring to the accompanying drawing for a more complete explanation ofmy invention, the gure shows a vertical section taken through theapparatus, showing its interior, with the piston and valves at one endof the stroke.

The meter consists of a main cylinder, A B,

having a piston, C, fitted to move within it. This piston is made hollowfor lightness, with both ends closed and with the central portion ofsmaller diameter than the ends, so that an annular chamber, II, isformed around the outside and between the ends, as shown. D E is thevalve-chamber, having two independent piston-valves, F F and G G',fitted within it. The two end chambers, D and E, of the cylinder are oflarger diameter than the central portion, and the valves consist of twocylindrical heads each, the outer ones, F and G, being of largerdiameter than the inner ones, F and Gr', the two parts of each valvebeing connected together by a shank or shaft, as shown.

Water is admitted into the central portion of the valve-chamber throughthe pipe or passage l, and it is discharged alternately through thepipes or passages 2 and 8. 4 and 5 are the pipes or passages connectingthe opposite ends of the cylinder A B with the valve-chamber, thesepipes opening into said chamber upon each side of the inlet-pipe l andbetween it and the discharge-pipes 2 and 3.

6 is a passage leading from the center of the valve-chamber D E into thecenter of the cylinder A B, and 7 and 8 are passages leading,respectively, from the opposite ends of the valve-chambers D or E intothe cylinder A B, opening therein at such points that when the piston Cis at one end of the stroke the passage G will open into one end of theannular chamber H and the passage 7 into the opposite end. The passage Swill open into the portion B of the cylinder. In the center of thesmaller part of the valve-chamber is an annular stop against which theends F and G of the valves are checked in their movements toward thecenter.

The operation will then be as follows: The valve F F being at the rightend of the cylinder D E and the valve G G having moved as far to theright as the annular stop in the valve-chamber will admit, waterunder'pressure entering through pipe l will pass :between th'e smallerends, F and G', of the two valves and will enterV the pipe 4, which isopen, by reason of the valve F F being at the extreme right end of itsstroke, passing through the pipe 4, as shown by the arrow, and into theend B of the cylinder, driving the piston C before it until it reachesthe end of its stroke, in which position it is now shown. The waterunder pressure which enters through the pipe l also passes through thepassage 6 into the chamber H of the piston C. When the piston reaches apoint near the right end of its stroke, the passage 7 will be exposed soas to open into the chamber II, and the water under pressure then passesthrough the passage 6, the chamber I-I, and the passage 7 to the outerend of the chamber D, where it presses upon the larger piston, F, andthus overcomes the pressure upon the smaller piston, F. These pistons,connected by a shank, as above described, are then moved toward the leftand connect pipes 4 and 2. lVater is now allowed to escape through pipes4 and 2 from the end I3 of the water-cylinder. The pressure upon thepiston G will also be relieved by means of the passage 8, so as to allowit to move toward the left. The pistons F F and G G then move in unisontoward the left end of the cylinder D E. As soon as the passage 5 isslightly opened to the pressure of water entering through l, by reasonof the valve G passing beyond it, the valve F F comes to rest. The stemsf and g are in contact after 4 and 2, and until 5 and l are connected.Water will commence to iiow through this pas- IOO sage or pipe and intothe end A of the watercylinder, thus starting the piston C on itsjourney toward the left end of the cylinder. This valve F F', havingcome to rest in such a position that the passages 2 and 4 communicatewith each other through the annular space about the shank of this valveand between the pistons F F', allows the water in the left end, B, ofthe cylinder to escape through the pipes 4 and 2. The piston G Gcontinues its motion toward the left,co1npleting the opening of the portof 5, the pressure on G from l overcoming the friction. Vhen the chamberIl has reached such a point as to uncover the passage 8, it allows it toreceive water through the passage 6 and the annular chamber Il in thesame manner that water was previously delivered through 6 and 7. Whenthis takes place, the valve G will be again forced to the right, theinlet-passage of the right end, A, of the cylinder will be closed, andthe inlet passage to the left end will again be opened and the operationrepeated. By this construction it will be seen that the Whole operationof reversing the movements of the valves and of the piston within themeter is effected by the pressure of the water, and the independentmovements of the valves prevent any stoppages or dead-points. The pistonC is cushioned at each end of the stroke, either by imprisoning a smallquantity of water between the piston and the end of the cylinder as thepiston covers the ingresspoint, or by means of a projection which entersa corresponding recess in the end of the cylinder, or by other similaror suitable means.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. The main cylinder with the piston having. the chamber H, thevalve-chamber with the two independent reciprocating Valves having eachtwo unequally-sized flanges or heads, and supply and discharge passagesconnecting with the cylinders, as shown, in combination with the pipesor passages 6, 7, and 8, substantially as and for the purpose hereindescribed.

2. In a meter, the main cylinder with a reciprocating piston having achamber at its central portion, and a valve-chamber the ends of whichare of larger diameter than the intermediate connecting portion, incombination with independent valves, each having heads or fianges ofdifferent diameters fitting the ends and intermediate portion of thevalvechamber, the supply and exhaust pipes opening into thevalve-chamber, the pipes connecting the Valve-chamber with the ends ofthe main cylinder, and the supplemental passages 6, 7, and 8,substantially as herein described.

In witness whereof I have hereunto set my hand.

FREDERICK GUTZKOW. Witnesses:

S. H. NoURsE, H. C. LEE.

